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autossh
From Gentoo Wiki (test)
AutoSSH is a command that detects when SSH connections drop and automatically reconnects them.
Installation
USE flags
USE flags for net-misc/autossh Automatically restart SSH sessions and tunnels
Emerge
root #
emerge --ask net-misc/autossh
Configuration
Important tips
The "-M" option is required, even if you don't want to use the monitoring option (in which case, use "-M 0").
When using "-M"...
- Connections are tunnelled. No firewall changes needed for autossh's monitoring feature.
- Ports need to be above 1024 if you are not logging in as root.
- If you use a password prompt, then autossh will wait for your password when it reconnects, and it won't be fully connected until you give that password. So, it's helpful to use a key (instead of password) and ssh-agent.
Examples
- 1) Simple login example
user $
autossh -M 0 username@myserver
- 2) More Complex Example
SSH on port 222. Setup a SOCKS proxy on port 9999. Using "ServerAliveInterval" and "ServerAliveCountMax" as recommended in the autossh README file.
user $
autossh -M 0 -p 222 -N -D 9999 -o "ServerAliveInterval 45" -o "ServerAliveCountMax 2" username@myserver
- 3) Use autossh with sshfs
user $
sshfs -o reconnect,compression=yes,transform_symlinks,ServerAliveInterval=45,ServerAliveCountMax=2,ssh_command='autossh -M 0' username@server:/ /mnt/remote"
Removal
Unmerge
root #
emerge --ask --unmerge net-misc/autossh
See also
- SCP - A Secure Copy Program that comes with the SSH suite.
- SFTP - Secure File Transfer Protocol client that comes with the SSH suite.
- SSH - An encrypted terminal program.
- SSHFS - A FUSE based SSH powered mount client.
External resources
- http://wiki.openwrt.org/doc/howto/autossh - OpenWRT's wiki page on autossh.
- http://www.linuxjournal.com/content/autossh-all-your-connection-lost - A short autossh article written by Linux Journal.